[INFO] fetching crate buttboost 0.0.1-alpha.0...
[INFO] checking buttboost-0.0.1-alpha.0 against master#9bfa31f632912180dc742809bcc51a97f2d7079d for pr-140151
[INFO] extracting crate buttboost 0.0.1-alpha.0 into /workspace/builds/worker-2-tc1/source


unable to download buttboost version 0.0.1-alpha.0

Caused by:
    unexpected end of file